基于弹性薄板理论的大南湖矿区弱胶结覆岩离层动态演化规律研究  

Study on Dynamic Evolution Law of Weak Cementation Overburden Separation Layer in Dananhu Mining Area Based on Elastic Sheet Theory

作　　者：滕博 李东顶 李文平[2] TENG Bo;LI Dongding;LI Wenping(Xinjiang Energy Company,China Coal,Urumqi 830000,China;School of Resources and Geosciences,China,University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中煤集团新疆能源公司,乌鲁木齐830000 [2]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《煤炭技术》2024年第11期45-50,共6页Coal Technology

基　　金：中煤揭榜挂帅项目(2022JB01);国家自然科学基金面上项目(42372316)。

摘　　要：以大南湖7#矿井为研究区,基于组合梁原理和弹性薄板理论对工作面离层发育位置进行预计,通过计算离层上下岩层组的挠度差,计算了离层的体积和破断距,利用GDEM模拟软件对工作面离层动态发育过程进行模拟。结果表明,离层发育于3煤顶板泥岩与上部厚层粗砂岩之间。依据薄板弹性理论,离层的最大挠度差约为721 mm,离层的体积约为297 m^(3),离层的位置随着工作面不断移动,并在工作面推进320 m左右的位置闭合,产生水害的可能性较小。Taking Dananhu No.7 mine as the research area,based on the principle of composite beam and elastic sheet theory,the separation development position of the working face was predicted,the volume of the separation layer and the breaking distance of the separation layer were estimated by calculating the deflection difference of the upper and lower rock formation groups,and the GDEM simulation software was used to simulate the dynamic development process of the separation of the working face.The results showed that the separation layer developed between the No.3 coal roof mudstone and the upper thick coarse sandstone.According to the elastic theory of thin plates,the maximum deflection difference of the separation layer is about 721 mm,and the volume of the separation layer is about 297 m^(3),and the position of the separation layer moves continuously with the working surface and closes at the position of about 320 m advancing the working surface,and the possibility of water damage is small.

关 键 词：弱胶结 离层 数值模拟 

分 类 号：TD32[矿业工程—矿井建设]